:root {
  --bg: #f5f5fb;
  --bg-elevated: #ffffff;
  --bg-soft: #f9fafb;
  --border-subtle: rgba(15, 23, 42, 0.06);

  --text: #0f172a;
  --text-soft: #334155;
  --text-muted: #94a3b8;

  --accent: #6366f1;     /* آبی-بنفش شبیه Linear */
  --accent-soft: rgba(99, 102, 241, 0.08);
  --accent-strong: #4f46e5;
  --accent-alt: #0ea5e9;

  --danger: #ef4444;

  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;

  --shadow-soft: 0 32px 80px rgba(15, 23, 42, 0.14);
  --shadow-subtle: 0 18px 40px rgba(15, 23, 42, 0.12);

  --font-main: "Inter", "Vazirmatn", system-ui, -apple-system,
    BlinkMacSystemFont, "Segoe UI", "SF Pro Display", sans-serif;

  --max-width: 1120px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-main);
  background: radial-gradient(circle at top, #ffffff 0, #f5f5fb 45%, #eef2ff 100%);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

main {
  padding-inline: 16px;
  flex: 1;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid rgba(148, 163, 184, 0.3);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
}

/* Brand / Logo */

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background:
    radial-gradient(circle at 20% 20%, #f97316, transparent 55%),
    radial-gradient(circle at 80% 30%, #6366f1, transparent 55%),
    radial-gradient(circle at 50% 90%, #22c55e, transparent 55%);
  box-shadow: 0 0 0 1px rgba(148, 163, 184, 0.4), var(--shadow-subtle);
}

.logo-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.logo-main {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.logo-dot {
  color: var(--accent);
}

.logo-sub {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  color: var(--text-muted);
}

/* Nav */

.main-nav {
  display: none;
}

.main-nav ul {
  display: flex;
  align-items: center;
  gap: 18px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.main-nav a {
  font-size: 0.88rem;
  color: var(--text-soft);
  padding: 4px 0;
  position: relative;
}

.main-nav a::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  bottom: -4px;
  height: 2px;
  border-radius: 999px;
  transform-origin: center;
  transform: scaleX(0);
  background: linear-gradient(to right, var(--accent), var(--accent-alt));
  transition: transform 0.18s ease-out;
}

.main-nav a:hover::after,
.main-nav a.active::after {
  transform: scaleX(1);
}

/* Lang switch */

.lang-switch {
  display: flex;
  font-size: 0.78rem;
  color: var(--text-muted);
  gap: 4px;
}

.lang-switch span.active {
  color: var(--accent-strong);
}

.lang-switch span[data-lang] {
  cursor: pointer;
}

/* Nav toggle (mobile) */

.nav-toggle {
  border: none;
  background: transparent;
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
}

.nav-toggle span {
  width: 20px;
  height: 2px;
  border-radius: 999px;
  background: var(--text-soft);
  transition: transform 0.16s ease, opacity 0.16s ease;
}

/* Hero */

.hero {
  max-width: var(--max-width);
  margin: 32px auto 24px;
  display: grid;
  gap: 28px;
  align-items: center;
}

.hero-text {
  z-index: 1;
}

.hero-kicker {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--accent-strong);
  margin: 0 0 10px;
}

.hero h1 {
  font-size: clamp(1.8rem, 4.4vw, 2.6rem);
  line-height: 1.25;
  margin: 0 0 12px;
}

.hero-body {
  font-size: 0.98rem;
  color: var(--text-soft);
  margin: 0 0 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 0.9rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.16s ease, color 0.16s ease, border-color 0.16s ease,
    box-shadow 0.16s ease, transform 0.08s ease-out;
}

.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-alt));
  color: #f9fafb;
  box-shadow: 0 10px 25px rgba(79, 70, 229, 0.35);
}

.btn.primary:hover {
  box-shadow: 0 16px 45px rgba(79, 70, 229, 0.5);
  transform: translateY(-1px);
}

.btn.ghost {
  background: rgba(148, 163, 184, 0.08);
  border-color: rgba(148, 163, 184, 0.3);
  color: var(--text-soft);
}

.btn.ghost:hover {
  background: rgba(148, 163, 184, 0.16);
}

/* Hero visual */

.hero-visual {
  position: relative;
  min-height: 240px;
  border-radius: var(--radius-lg);
  background: radial-gradient(circle at 10% 0, rgba(99, 102, 241, 0.16), transparent 55%),
    radial-gradient(circle at 90% 100%, rgba(14, 165, 233, 0.14), transparent 50%),
    var(--bg-elevated);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.hero-grid {
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image: linear-gradient(
      to right,
      rgba(255, 255, 255, 0.05) 1px,
      transparent 1px
    ),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 36px 36px;
  mix-blend-mode: screen;
}

.orb {
  position: absolute;
  border-radius: 999px;
  filter: blur(16px);
}

.orb-main {
  width: 160px;
  height: 160px;
  background: rgba(99, 102, 241, 0.9);
  top: -30px;
  left: -30px;
}

.orb-secondary {
  width: 120px;
  height: 120px;
  background: rgba(14, 165, 233, 0.9);
  bottom: -20px;
  right: -10px;
}

.hero-terminal {
  position: relative;
  margin: 24px;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.35);
  background: linear-gradient(
    145deg,
    #ffffff,
    #f9fafb
  );
  box-shadow: var(--shadow-subtle);
}

.hero-terminal-header {
  display: flex;
  gap: 6px;
  padding: 6px 10px;
  background: linear-gradient(to right, #e5e7eb, #e0f2fe);
}

.hero-terminal-header span {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
}

.hero-terminal-body {
  font-family: "SF Mono", ui-monospace, Menlo, Monaco, Consolas, monospace;
  font-size: 0.75rem;
  padding: 10px 12px 12px;
  color: #0f172a;
}

.hero-terminal-body p {
  margin: 2px 0;
}

/* Split panels */

.split {
  max-width: var(--max-width);
  margin: 10px auto 24px;
  display: grid;
  gap: 18px;
}

.panel {
  background: var(--bg-elevated);
  border-radius: var(--radius-lg);
  padding: 16px 18px 18px;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-subtle);
}

.panel h2 {
  margin: 0 0 10px;
  font-size: 1.15rem;
}

.panel p {
  margin: 0 0 10px;
  font-size: 0.94rem;
  color: var(--text-soft);
}

.identity-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 10px 0 8px;
}

.identity-tags span {
  padding: 4px 9px;
  border-radius: 999px;
  font-size: 0.78rem;
  background: var(--accent-soft);
  border: 1px solid rgba(99, 102, 241, 0.35);
  color: var(--accent-strong);
}

.identity-note {
  font-size: 0.9rem;
}

/* Workspace cards */

.panel-intro {
  margin-bottom: 12px;
}

.cards-grid {
  display: grid;
  gap: 10px;
}

.cards-grid.compact {
  grid-template-columns: minmax(0, 1fr);
}

.card {
  padding: 10px 12px;
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
}

.card h3 {
  margin: 0 0 4px;
  font-size: 0.98rem;
}

.card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-soft);
}

.card .meta {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.card.ghost-card {
  opacity: 0.65;
}

/* Audience */

.audience {
  padding: 24px 0 8px;
}

.audience-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  background: var(--bg-elevated);
  border-radius: var(--radius-lg);
  padding: 16px 18px 18px;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-subtle);
}

.audience h2 {
  margin: 0 0 10px;
  font-size: 1.15rem;
}

.audience-grid {
  display: grid;
  gap: 12px;
  margin-top: 8px;
}

.audience-grid h3 {
  margin: 0 0 4px;
  font-size: 0.98rem;
}

.audience-grid p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-soft);
}

/* Overview sections */

.overview {
  max-width: var(--max-width);
  margin: 0 auto 16px;
}

.section-header {
  margin-bottom: 10px;
}

.section-header h2 {
  margin: 0 0 4px;
  font-size: 1.05rem;
}

.section-header p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* CTA */

.cta {
  max-width: var(--max-width);
  margin: 16px auto 24px;
}

.cta-inner {
  border-radius: var(--radius-lg);
  padding: 18px 18px 18px;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.06), rgba(14, 165, 233, 0.08));
  border: 1px solid rgba(148, 163, 184, 0.35);
  box-shadow: var(--shadow-soft);
}

.cta-inner h2 {
  margin: 0 0 8px;
  font-size: 1.15rem;
}

.cta-inner p {
  margin: 0 0 14px;
  font-size: 0.92rem;
  color: var(--text-soft);
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* Footer */

.site-footer {
  border-top: 1px solid rgba(148, 163, 184, 0.3);
  margin-top: 16px;
  padding: 14px 16px 18px;
  background: #ffffff;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-main {
  max-width: var(--max-width);
  margin: 0 auto 8px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-brand {
  margin: 0 0 4px;
  font-weight: 600;
  color: var(--text-soft);
}

.footer-text {
  margin: 0;
}

.footer-contact p {
  margin: 0 0 3px;
}

.footer-contact a {
  color: var(--accent-strong);
}

.footer-muted {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.footer-bottom {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
  font-size: 0.78rem;
}

/* Contact page */

.contact-main {
  max-width: var(--max-width);
  margin: 24px auto 24px;
  padding-inline: 16px;
}

.contact-hero {
  margin-bottom: 14px;
}

.contact-hero h1 {
  margin: 0 0 6px;
  font-size: 1.4rem;
}

.contact-hero p {
  margin: 0;
  color: var(--text-soft);
  font-size: 0.94rem;
}

.contact-layout {
  display: grid;
  gap: 16px;
}

.contact-info {
  border-radius: var(--radius-lg);
  padding: 14px 16px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
}

.contact-info h2 {
  margin: 0 0 8px;
  font-size: 1.02rem;
}

.contact-info ul {
  list-style: none;
  padding: 0;
  margin: 0 0 8px;
}

.contact-info li {
  margin-bottom: 6px;
  font-size: 0.9rem;
}

.contact-info a {
  color: var(--accent-strong);
}

.contact-note {
  margin: 0;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.muted {
  color: var(--text-muted);
}

.contact-form-wrapper {
  border-radius: var(--radius-lg);
  padding: 14px 16px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
}

.contact-form-wrapper h2 {
  margin: 0 0 6px;
  font-size: 1.02rem;
}

.form-intro {
  margin: 0 0 10px;
  font-size: 0.86rem;
  color: var(--text-muted);
}

.contact-form .field {
  margin-bottom: 10px;
}

.contact-form label {
  display: block;
  margin-bottom: 4px;
  font-size: 0.82rem;
  color: var(--text-soft);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border-radius: 10px;
  border: 1px solid rgba(148, 163, 184, 0.6);
  background: #ffffff;
  color: var(--text);
  padding: 7px 9px;
  font-family: inherit;
  font-size: 0.9rem;
  outline: none;
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--accent-strong);
  box-shadow: 0 0 0 1px rgba(159, 122, 234, 0.4);
}

.contact-form button[disabled] {
  opacity: 0.55;
  cursor: not-allowed;
}

/* Responsive */

@media (min-width: 720px) {
  .site-header {
    padding-inline: 24px;
  }

  main {
    padding-inline: 24px;
  }

  .hero {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1.2fr);
    margin-top: 38px;
  }

  .split {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.2fr);
  }

  .cards-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .cards-grid.compact {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .audience-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .cta-inner {
    padding-inline: 22px;
  }

  .footer-main {
    flex-direction: row;
    justify-content: space-between;
  }

  .contact-layout {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.2fr);
  }

  .nav-toggle {
    display: none;
  }

  .main-nav {
    display: block;
  }

  .lang-switch {
    /* روی دسکتاپ هم نمایش دارد؛ نیازی به تغییر display نیست */
  }
}

/* Mobile nav */

@media (max-width: 719px) {
  .main-nav {
    position: absolute;
    top: 52px;
    inset-inline: 12px;
    background: var(--bg-elevated);
    border-radius: 18px;
    border: 1px solid var(--border-subtle);
    box-shadow: 0 20px 40px rgba(15, 23, 42, 0.18);
    padding: 10px 12px 8px;
    display: none;
  }

  .main-nav.open {
    display: block;
  }

  .main-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .lang-switch {
    /* روی موبایل هم نمایش داده می‌شود؛ فقط منو جمع‌شونده است */
  }
}